Accelerator



Feb. 26, 1924.-

G. STEWART ACCELERATOR Filed July 25, 1925 2 Sheets-Sheet 1 eo yeflzezaa/f Feb. 26, 1924.;

G. STEWART ACCELERATOR Filed July 25, 1923 2 Sheets-Sheet 2 Patented Feb. 26, 1924.

we, sitar GEORGE STEWART, OF'BROWNSVILLE, PENNSYLVANIA.

ACCELEBA'IOR.

Application filed July 25,

T all whom it may concern Be it known that I, GEORGE STEWART, a citizen of the United States, residing at Brownsville, in the county of Fayette and State of Fennsylvania, have invented certain new and useful Improvements in Accelerators, of which the following is a specification, reference being had to the accompanying. drawings.

This invention relates to accelerators for internal combustion engines and more particularly to a device of this character which may be applied to the internal combustion engines of vehicles which are not provided with a foot accelerator in the course of their manufacture.

An important object of the invention is to provide a device of this character which may be attached to the engine with minimum change in the present construction of the control mechanism of the engine and which will not, when in applied position, interfere with the normal operation of the ordinary controls.

A further object of the invention is to provide a device of this character which is simple in its construction and arrangement and which will be durable and eficient in service.

These and other objects I attain by the construction shown in the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein Figure 1 is a side elevation showing an accelerator constructed in accordance with my invention applied to an engine;

Figure 2 is a plan view thereof;

Figure 3 is a front end elevation of the accelerator removed; and V Figure 4 is a perspective showing the manner of attaching the throttle rod and throttle link.

Referring now more particularly to the drawings, the numeral designates the head of the engine, 11 the bolts used for securing the head to the block 12, 13 the carburetor of the engine, and 14 the control arm of the carburetor which is mounted for oscillation. The end of this control arm is engaged by a rod 15, movement of which is accomplished through an arm 16 of the throttle rod 17, the upper end of which is provided with an operating mechanism in the form of a lever, (not herein disclosed). The rear end Qfthe engine head extends 1923. Serial No. 653,699.

below the dash 18 in slightly spaced relation thereto. From this dash floor boards 19 forming the flooring of the cock pit of the vehicle incline rearwardly and downwardly.

In accordance with my invention I provide a rigid metal frame 20 adapted to rest upon the engine head and having spaced openings 21 for the reception of the two rearmost securing elements of the head at the side of the head next adjacent the carburetor 13. The rear end of thisframe is bent downwardly, as indicated at 22, and is provided with an angular extension 23 paralleling the rear end of the engine head and extending closely thereagainst. From this angular extension a pair of arms 24 are upwardly directed and are provided at their upper ends with bearings 25 in which is disposed a shaft 26 having an upwardly extending angular end portion 27. This shaft intermediate the bearings 25 has secured thereto an operating foot pedal 28. This foot pedal overlies the foot board for engagement by the foot of the operator.

The forward end of the frame 20 ispro- 'vided with an angular extension 29, the outer end of which overlies the shaft 14'' of the operating arm 14 of the carburetor throttle and which is provided with a vertical bearing 30 approximately aligning with the axis of this shaft. Extending downwardly from the angular extension 29 intermediate its ends is an arm 31 having at its lower end a bearing 32 aligned with the bearing 30 and combining therewith for the reception of a vertically disposed shaft 33. The lower end of the shaft 33 is provided with an angular offset 34 having in its end a fork 35 receiving between the arms thereof the operating arm 14 of the throttle. The upper end of the shaft'has secured thereto one end of a lever arm 36, the attaching preferably being accomplished by means of a set screw 37 so that the arm 36 is rotatably adjustable about the shaft. The free end of this arm is provided with an upwardly directed portion 38 extending through the eye 39 of a link 40. The link 40 is provided at its rear end with an upwardly and for wardly angling extension 41, the upper end of which is provided with an angularly dis posed portion directed through an eye 42 formed on the upper end of the angular portion 27 of the shaft 26. To the link 40rand to the forward angular extension 29 of the frame 20 are secured the ends of'a tension spring 43 normally forcing the link forwardly when in its forward position, movement of the link is limited by reason of the fact that the arm 36 and link come approximately aligned and in this position the various parts of the device are normally held by a spring 43. With the parts in this position the pedal 28 is elevated and the throttle arm 14 is in that position in which the throttle is completely closed. To the throttle rod arm engaging end of the link 15 I apply a sleeve 44- having an outstanding pivot member 41-5 for engaging in the eye 16 of the throttle rod arm.

It will be seen that as the pedal 28 is depressed the upper end of the angular extension 27 of the shaft 26 will be moved rearwardly carrying with it the rear end of the link 40 and causing the arm 36 to be shifted and to thereby rock the shaft 33 and the throttle arm 14. During movement of the throttle arm by the shaft 33 the end of the link 15 will slide through the sleeve 4: 1 and accordingly the setting of the operating lever of the throttle rod will not be affected. Since the fork .35 engages the arm 14 adjacent the point of attachment thereof to the shaft 1 1 the spring 13 will not exert sufficient pressure on the throttle arm 1 1 to affect the setting hereof through the throttle rod 17 at any time. By the structure hereinbefore set forth a very solid and rigid support for the accelerator is provided and the device may be very cheaply produced. It will, of course, be obvious that the structure hereinbefore. set forth is capable of some change and modification without in any manner departing from the spirit of my invention and I accordingly do not limit myself to such specific structure except as hereinafter claimed.

l. A throttle control for engines having a carburetor provided with a throttle shaft and a I throttle arm carried by the shaft,

comprising a frame adapted to be secured to V the head of the engine having an angular extension overlying the carburetor, the angular extension being provided with a depending arm, the arm and extension having vertically aligned bearings, a shaft directed throughsaid bearings and having at its lower end an offset fork portion the arms of which embrace the throttle arm, and foot operated means for rotating said shaft in. one direction and a spring'for rotating the shaft in the opposite direction.

2. A throttle control for engines having a carburetor provided with-a throttle shaft and a throttle arm carried by the shaft, comprising a frame adapted tobe secured to the head of the engine having an angular extension overlying the carburetor, the angular extension being provided with a depending arm, the arm and extension having vertically aligned bearings, a shaft directed through said bearings and having at its lower end an offset fork portion the arms of which embrace the throttle arm, and foot operated means for rotating said shaft in [one direction and a spring for rotating the shaft in the opposite direction, said foot operated means including a link engaging the shaft to limit the movement of the shaft under influence of the spring.

3. A throttle control for engines having a carburetor provided with a throttle shaft and a throttle arm carried by the shaft, com-' prising a frame adapted to besecured to the head of the engine having an angular extension overlying the "carburetor, the angular extension being provided with a-depending arm, the arm and extension having vertically aligned bearings, a shaft directed through said bearings and, having at its.

lower end an offset fork portion the arms of which embrace the throttle arm, and foot operated means for rotating said shaft in one direction and a spring for rotating the shaft in the opposite direction, said foot operated means including an angular extension formed at the opposite end of said.

carburetor provided with a throttle'shaft' and a throttle arm carried by the shaft, comprising a frame adapted to be secured tothe head of the engine having an angular extensionoverlying the carburetor, the angular extension being provided with a depending arm, the arm and extension having vertically aligned bearings, a shaft directed through said bearings and having at its lower end an offset fork portion the arms of which embrace the throttlearm, and foot opera-ted means for rotating said shaft'in one direction and a spring for rotating the shaft in the opposite direction, said foot operated means including an'angular extension formed at the opposite end of saidframe work 7 and in said bearing and having an angular end portion, and a link engaging the end ofsaid angular end portion with one end thereof,

provided with horizontally ,allgned bearings, a shaft rotatably mounted said first named shaft having an arm, the

free end of said link engaging the free end of said arm, said link by its engagement with said shaft limiting the rotation of the shaft under influence of the'spring.

5. A throttle control for engines having a carburetor provided with a throttle shaft and a throttle arm carried by the shaft, com-" prising a frame adapted to be secured to the head of the engine having an angular extension overlying the carburetor, the angular extension being provided with a depending arm, the arm and extension having Vertically aligned bearings, a shaft directed through said bearings and having at its lower end an offset fork portion the arms of which embrace the throttle arm, and foot operated means for rotating said shaft in one direction and a spring for rotating the shaft in the opposite direction, said foot operated means including an angular extension formed at the opposite end of said 1 frame work and provided with horizontally said first named shaft having an arm, the 20 free end of said link engaging the free end of said arm, said link by its engagement with said shaft limiting the rotation of the shaft under influence of the spring, said spring being connected at one end to said 25 angular extension and at the opposite end to said link.

In testimony whereof I hereunto aflix my signature.

GEORGE STEWART. 

